CONTENTS

 1     Scope
 2     Normative references
        2.1     Identical Recommendations | International Standards
 3     Definitions
        3.1     Reference Model definitions
        3.2     Service definition conventions
        3.3     Quality-of-Service Framework definitions
        3.4     Enhanced Communications Transport Service definitions
 4     Abbreviations
 5     Conventions
        5.1     General conventions
        5.2     Parameters
        5.3     Notations
 6     Overview and general characteristics
 7     Features of the Enhanced Communications Transport Service
 8     Model of the Enhanced Communications Transport Service
        8.1     Types of Transport Connection
        8.2     Model of Transport Connection
 9     Transport Connection characteristics
        9.1     Active group integrity
                  9.1.1     AGI policy
                  9.1.2     Population
                  9.1.3     TC type
                  9.1.4     Transmit diversity
                  9.1.5     Receive diversity
                  9.1.6     Transmit concurrency
        9.2      Quality of service
10     Quality of service for Transport Connections
       10.1     QoS classification
                 10.1.1     TC performance
                 10.1.2     TC reliability
                 10.1.3     TC ordering
                 10.1.4     Miscellaneous
       10.2     Levels of QoS agreement
                 10.2.1     Best effort level
                 10.2.2     Guaranteed level
       10.3     QoS negotiation mechanisms
                 10.3.1     Generic QoS negotiation
                 10.3.2     OA QoS negotiation
                 10.3.3     SWA QoS negotiation
                 10.3.4     Considerations
       10.4     Phases of QoS agreement
11     Enhanced Communications Transport Service primitives and parameters
       11.1     Definitions
       11.2     Sequence of primitives at a TSAP
12     TC Creation service
       12.1     Function
       12.2     Types of primitives and parameters
                 12.2.1     Called address
                 12.2.2     Calling address
                 12.2.3     Responding address
                 12.2.4     TC-characteristics
                 12.2.5     TS-user data
                 12.2.6     Reason
       12.3     Sequence of primitives
13     TC Invitation service
       13.1     Function
       13.2     Types of primitives and parameters
                 13.2.1     Called address
                 13.2.2     Calling address
                 13.2.3     TC-characteristics
                 13.2.4     TS-user data
       13.3     Sequence of primitives
                 13.3.1     Invitation for a heterogeneous TC
                 13.3.2     Invitation for a late join
14     TC Join service
       14.1     Function
       14.2     Types of primitives and parameters
                 14.2.1     Called address
                 14.2.2     Calling address
                 14.2.3     Responding address
                 14.2.4     TC-characteristics
                 14.2.5     TS-user data
                 14.2.6     Reason
       14.3     Sequence of primitives
15     Data Transfer service
       15.1     Function
       15.2     Types of primitives and parameters
                 15.2.1     Called address
                 15.2.2     Calling address
                 15.2.3     TC-characteristics
                 15.2.4     Status
                 15.2.5     TS-user data
       15.3     Sequence of TS primitives
16     Pause service
       16.1     Function
       16.2     Types of primitive and parameters
                 16.2.1     Reason
       16.3     Sequence of TS primitives suspending data transfer
17     Resume service
       17.1     Function
       17.2     Types of primitive and parameters
                 17.2.1     Reason
       17.3     Sequence of primitives
18     Report service
       18.1     Function
       18.2     Types of primitive and parameters
                 18.2.1     Reason
       18.3     Sequence of TS primitives
19     TC Leave service
       19.1     Function
       19.2     Types of primitives and parameters
                 19.2.1     Called address
                 19.2.2     Calling address
                 19.2.3     Reason
       19.3     Sequence of primitive
                 19.3.1     TS-user rejection of a TC Creation
                 19.3.2     TS-user rejection of a TC Join
                 19.3.3     TS-provider rejection of a TC Join attempt
                 19.3.4     TS-user invoked Leave
                 19.3.5     TS-provider expulsion of a TS-user Leave
20     TC Termination service
       20.1     Function
       20.2     Types of primitives and parameters
                 20.2.1     Reason
                 20.2.2     TS-user data
       20.3     Sequence of primitives
                 20.3.1     TC-owner invocation of a TC termination
                 20.3.2     TS-provider invocation of a TC termination
                 20.3.3     Simultaneous TC-owner and TS-provider invocation of a TC termination
                 20.3.4     Unsuccessful TC Creation with multiple TS-user rejection(s)
                 20.3.5     Overall TS-user rejections of a TC creation attempt
                 20.3.6     TS-provider rejection of a TC creation attempt due to lack of local resource
                 20.3.7     TS-provider rejection of a TC creation attempt due to incomplete TC-characteristics
21     TC-ownership service
       21.1     Function
       21.2     Types of primitives and parameters
                 21.2.1     Called address
                 21.2.2     Calling address
                 21.2.3     Responding address
                 21.2.4     TS-user data
                 21.2.5     Reason
       21.3     Sequence of primitives
                 21.3.1     Ownership transfer to a specified TS-user
                 21.3.2     Ownership transfer to the whole TS-user candidates
22     Token service
       22.1     Function
       22.2     Types of primitives and parameters
                 22.2.1     Called address
                 22.2.2     Calling address
                 22.2.3     Responding address
                 22.2.4     TS-user data
                 22.2.5     Reason
       22.3     Sequence of primitives
                 22.3.1     Token distribution to a specified TS-user
                 22.3.2     Token return from a specified TS-user
                 22.3.3     Token retrieval from a specified TS-user
                 22.3.4     Token request from a TS-user
Annex  A  –  TC ordering relationships
        A.1     Properties of ordering
                  A.1.1     No ordering
                  A.1.2     Local ordering
                  A.1.3     Causal ordering
                  A.1.4     Partial ordering
                  A.1.5     Total ordering